Lubricating means for sewing-machines.



I J. C. RINGE.

LUBRICATING MEANS FOR SEWING MACHINES.

APPLICATION HLED MAY 29. 1918.

1 ,293,931 Patented Feb. 11. 1919.

WITNESSES: lNV NTOR $02 fl i ATTORNEY I from 3500 to 5,000 stitches per minute, and as a para era raia mo JOHN G. EINGE, or isnrneEron'r, CONNECTICUT, assxenon. 'ro THE SINGER MANUFAC- roams COMPANY, A CORPORATION or NEW JERSEY.

LUBRICATING MEANS FOR ING-MACHINES.

Specification of Letters Patent.

Patented Feb. 311, 19119.

Original application filed February 9, 1916, Serial No. 77,123. Divided and. this application filed May 29,

1918. Serial No. 237,208.

following is a specification, reference being had therein to the accompanying drawings. This invention relates to an lmprovement 'in the means for lubricating'the bobbin-case raceways of sewingmachines in which the loop-taker operates. at high speed, such as the machine shown in my copending appli-v cation Serial No. 77 ,123, filed February 9, 1916, of which the present application is a division.

The machine above mentioned produces relatively large-bobbin-case is used, considerable friction and overheatin would result, due to the high speed "an large bear-.

ing surface between the bobbin-case and its raceway in the loop-taker body, if this race:

way were not properly lubricated.

he present lnvention has for its objects to provide an efficient and simple lubricating means for the bobbin-case raceway, to

which oil may be supplied from either above or below the bed-plate as desired, in which centrifugal force is utilized to aid in the distribution of the lubricant, which'isnot liable to soil the mass of lower thread, and which in addition may lubricate the shaft of the loop-taker.

The invention comprises a rotary-looptaker body having a raceway therein in which is journaled a bobbin-case bearing rib, the bobbin-case being held against rotation. The body is connected by radial arms to its operating shaft. The shaft is formed with a duct adjacent said body, one end of said duct communicating with the raceway by a duct in one'of the radial arms, while the other end of the shaft duct communicates with a peripheral recess in the shaft. An oil supply inlet leads from the upper surface of the bed-plate throughfithe shaft bearing 4 with the duct 8 and being open on the side and its bushing to the peripheral recess. A

second oil inlet leads into the duct of the radial arm through an enlargement on said arm, and absorbent material is preferably packed in said enlargement. V

In the accompanyin drawings, Figure 1 is a vertical longitudinal section through the loop-taker and its shaft showing a portion of the bed-plate. Fig. 2 is a perspective view of the loop-taker body and its shaft, with the shaft broken away toshow'the oil duct. Fig. 3 is a perspective .view of the: loop-taker body, showing the bobbin-case raceway therein and the outlets of the oil supply ducts. i Referring to the drawings, the numeral 1 indicates a loop-taker body having within the same a raceway 2 in which fits the bearing rib 3 of the bobbin-case 4. Radial arms 5 connect the loop-taker body to its hub i posed enlargement 9 having a cavity. 10"

therein, said cavity being in communication nearest the shaft- This cavity is designed to be filled with wicking or other absorbent material. The shaft 6 has a duct 11 therein in the portion nearest the loop-taker body, said duct communicating at one end by a branch 12 with the duct 8 and at'the other end by a branch 13 with a peripheral recess 14 in the shaft. The shaft rotates in a bush-- ing 15 carried by' a bearing 16 below the bedplate 17-, and an oil inlet 18 in the bed-plate communicates with the peripheral recess 14 through an openin 19 in the bushing.

It will be note that due to the radial disposition of the duct 8 and cavity 10 the distribution of the lubricant is greatly aided by centrifugal force when the machine is in operation. I

The raceway may be lubricated from above the bed-plate by introducing oil in the inlet '18, thus lubricating both the shaft bearing and aceway, or oil may be'applied to the packing in the cavity through the 1 open end of the latter.

Having thus set forth the nature of the invention, what I claim herein is-- 1. A sewing machine loop-taker comprising a cup-shaped bodyformed with a thread-cavity having an annular raceway and a tubular hub connected with said body by a radial member having a substantially radial lubricant duct extending from the bore' of said hub outwardly through the radial connecting member and communicating at its outer end with said raceway.

2.. A sewing machine loop-taker compris-- ing a cup-shaped body formed with a thread-cavity having an annular. raceway and a tubular hub connected with said body by a radial member having a substantially radial lubricant duct" extending from the bore of saidhub outwardly through the radialconnecting member and communicating at, its outer end with said raceway, said duct having an enlargement intermediate its extremities to afford a lubricant cavity which.

is open at the end thereofadjacent said hub I for introduction of lubricant.

.way and a hub mounted upon said shaft and connected with said-body by a radial member having a substantially radial lubricant duct communicating at one end with the second vofsaidtransverse lubricant passages; of the shaft and at the other end with said raceway of the loopftaker body.

4. In a sewing machine, a bed-plate, a loop-taker body, a bobbin-case raceway therein, and means whereby said raceway may be lubricated from above the bed-plate.

5. In a sewing machine, a bed-plate, a loop-taker body, a bobbin-case raceway therein, an operating shaftfor said body, a bearing for said shaft, and means whereby said bearing and raceway may be lubricated from above the bed-plate. Y

6. In a sewing machine, a loop-taker body, abobbin-case raceway therein, an opcrating shaftfor said body, and means for lubricating said raceway through said shaft. 7. In a sewing machine, a loop-taker body, an operating shaft, a radial connection therebetween,'a bobbin-case raceway. in said body, and means for supplying lubricant to 'to said raceway.

said raceway through said connection and shaft.

8. In a sewing machine, a loop-taker body,

an operating shaft therefor, a bobbin-case 10. In a sewing machine, a bed-plate, a

loop-taker body, a bobbin-case raceway therein, and lubricant supply means for said raceway having inlets both at the top of and below the bed plate.

11. In a sewing machinefa bed-plate, a I

loop-taker body, a bobbin-case raceway therein, a shaft connected to said body, a bearing for said shaft, means whereby lubricant may be supplied from above the bedplate to said bearing and raceway, and means for supplying lubricant, from below the bed-plate to said raceway.

12. In a sewing machine, a rotary looptaker body, a bobbin-case raceway therein, and means for supplying lubricant to the raceway axially of said body.

13. In a sewing machine, a rotary looptaker body, a bobbin-case raceway therein, and means for supplying lubricant to the raceway axially and radially of said body.

14. In a sewing machine, a rotary looptaker body, a bobbin-case raceway therein, a support for said body, and means for supto said raceway. 16'. In a sewing machine, a movable looptaker body, a bobbin-case raceway therein,"

a stationary lubricant supply means, and means utilizing centrifugal force for conducting lubricant from said supply means tosaid raceway.

17. In a sewing machine, a rotatable looptaker body, a bobbin-case raceway therein, a stationary lubricant supply means, and means rotatable with said body for conducting lubricant. from said supply means 18. In a sewingmachine, a rotatable looptaker body, a bobbin-case raceway therein, stationary lubri t supply means ofiset.

"plying lubricant to said raceway through lit from the axis of rotation of said body, and means extending partly in the direction of means utilizing centrifugal force for conthe axis of rotation of said body for conducting lubricant from said supply means to ducting lubricant from said supply means 10 said raceway. ,to said raceway.

5 19. In a sewing machine, a rotatable loop- In testimony whereof, I have signed my taker body, a bobbin-case raceway therein, name to this specification. a stationary lubricant supply means, and JOHN C. RIN GE. 

